Info from Mad Dad. As usual I haven't got a clue how to sort it.
Link for updated files(expires in 7 days):
https://we.tl/t-OlDMtmqWVi
Download and extract the zip file to your desktop
type in run box: %LocalAppData%\xlabs\data
Copy and paste the cef and iw4x folder into the data folder
This will merge the folders and overwrite the older file with the new.
Copy the iw4x.dll from the iw4x folder to the root of your IW4x game directory.
You should be good to run the game and it should say version r4303 at bottom right of main menu